Effect of Freezing-Thawing on Clayey Soils Reinforced with Human Hair Fibers

Yarbaşı, Necmi

doi:10.1080/15440478.2019.1690614

Cited by 11 publications

(3 citation statements)

References 18 publications

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“…Orakoglu et al [18] found that after being reinforced by glass fiber and basalt fiber, the loss ratio of shear strength and clay cohesion under freezethaw cycles decreased in varying degrees. Yarbasi [19] found that the unconfined compressive strength of clayey soil mixed 1.5% human hair fiber was 49% higher than that of unreinforced soil after freeze-thaw cycles. Liu et al [20] found that the unconfined compressive strength of clay with 0%, 0.2% and 0.4% cotton fiber after 20 freeze-thaw cycles was 186 kPa, 236 kPa and 278 kPa, respectively, which decreased by 37.58% 25.55% and 23.20% respectively compared with that without freeze-thaw cycles.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Freeze-Thaw Cycles on Unconfined Compressive Strength of Lignin Fiber-Reinforced Loess

Gao¹,

Zhong²,

Wang³

et al. 2022

Journal of Renewable Materials

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In the seasonal permafrost region with loess distribution, the influence of freeze-thaw cycles on the engineering performance of reinforced loess must be paid attention to. Many studies have shown that the use of fiber materials can improve the engineering performance of soil and its ability to resist freeze-thaw cycles. At the same time, as eco-environmental protection has become the focus, which has been paid more and more attention to, it has become a trend to find new environmentally friendly improved materials that can replace traditional chemical additives. The purpose of this paper uses new environmental-friendly improved materials to reinforce the engineering performance of loess, improve the ability of loess to resist freeze-thaw cycles, and reduce the negative impact on the ecological environment. To reinforce the engineering performance of loess and improve its ability to resist freeze-thaw cycles, lignin fiber is used as a reinforcing material. Through a series of laboratory tests, the unconfined compressive strength (UCS) of lignin fiber-reinforced loess under different freeze-thaw cycles was studied. The effects of lignin fiber content and freeze-thaw cycles on the strength and deformation modulus of loess were analyzed. Combined with the microstructure features, the change mechanism of lignin fiber-reinforced loess strength under freeze-thaw cycles was discussed. The results show that lignin fiber can improve the UCS of loess under freeze-thaw cycles, but the strengthening effect no longer increases with the increase of fiber content. When the fiber content is less than 1%, the UCS growth rate of loess is the fastest under freeze-thaw cycles. And the UCS of loess with 1% fiber content is the most stable under freeze-thaw cycles. The freeze-thaw cycles increase the deformation modulus of loess with 1% fiber content, and its ability to resist deformation is obviously better than loess with 1.5%, 2% and 3% fiber content. The fiber content over 1% will weaken the strengthening effect of lignin fiber-reinforced loess, and the optimum fiber content of lignin fiber-reinforced loess under freeze-thaw cycles is 1%.

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Section: Introductionmentioning

confidence: 99%

The Influence of Freeze-Thaw Cycles on Unconfined Compressive Strength of Lignin Fiber-Reinforced Loess

Gao¹,

Zhong²,

Wang³

et al. 2022

Journal of Renewable Materials

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“…In the modification of clay soils, waste/residue materials and natural rocks or minerals are widely used today as additives, both because they can reduce environmental pollution by reducing carbon dioxide emissions, which is a global problem, during production, and because they are economical and environmentally friendly [2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Contribution of Bayburt Tuffite (Bayburt Stone) Dust to the After Freeze-Thaw Strength Values of High Plasticity Clay Soils

Kul,

Yarbaşı

2024

Bitlis Eren Üniversitesi Fen Bilimleri Dergisi

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The strength properties of soils that are considered problematic, such as high plasticity clay, need to be improved for the increasing housing needs in parallel with the increasing population growth and the evolving needs of society due to continuous technological developments. In the last twenties, when global climate changes began to occur, improving the geotechnical properties of such soils, which form the basis of engineering structures, has become an important issue. For this reason, many studies have begun to improve and strengthen such soils using natural, synthetic, or various chemicals. For this reason, natural rocks are one step ahead of other healing materials in terms of being economical, sustainable, and environmentally friendly. In our study, Bayburt tuffite was added to the clayey soil by pulverizing it at the rates of 5%, 10%, and 15%, and the strength change after freezing and thawing was examined. Clay soil (CS) + Bayburt tuffite powder (BTP) mixture samples obtained in three different ratios were wrapped with stretch wrap in the laboratory environment (+20oC) and cured for 7, 14, and 28 days, ensuring the opt. moisture content was maintained. At the end of the curing period, the samples were subjected to +20oC, -20oC, 12 hours, and 10 cycles in the freeze-thaw cabinet, and then, Strength values were acquired with a uniaxial testing device. The highest strength value after freezing-thawing; was observed that it was 29.55% in the MIX1 (CS + 5% BTP) mixture cured for 28 days. As a result, it was concluded that this mixing ratio can be used in cold climates and shallow foundation depths with high plasticity clay soil properties.

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“…The addition of corn silk and corn starch to soft soils can improve their compaction properties, and the optimal contents of the additive are 0.5% corn silk and 4% corn starch [ 13 ]. A series of free pressure tests was conducted to examine the effects of human hair fibers on the reinforcement of clay soils under freeze–thaw cycles, and the results showed a significant increase in unconfined compressive strength due to the addition of 1.5% human hair fibers [ 14 ]. Similarly, when adding wool to clay, the fiber content of 1.5% remains the optimal content for compressive-strength enhancement after freeze–thaw action [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Value Coefficient of Polyethylene Fiber Soil Embankment Slope Based on Response Surface Analysis

Gong

Song

et al. 2022

Polymers

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The utilization of polymers can strengthen soil, but at a high price. In this study, value coefficients were proposed to evaluate the cost-effectiveness of fiber-reinforced roadbeds, and the effects of embankment-slope-influencing factors on the value coefficients were analyzed by response surface methodology. Ultrahigh-molecular-weight polyethylene fiber (UPEF) was used as the reinforcement material for soil. First, the shear strength parameters of fiber soil with different fiber diameters were obtained from the direct shear tests to set the parameters of the finite element models. Second, three factors, namely filling height, slope angle, and fiber diameter, were selected as input parameters based on the Box–Behnken Design (BBD) experimental design method, and their effects on the value coefficient of the fiber soil embankment slope were investigated. Finally, the design parameters at the maximum value coefficient of the fiber soil embankment slope were determined based on the results of the response surface analysis. The results indicated that the addition of UPEF could effectively improve the cohesion of the soil; the interaction between the filling height and fiber diameter is most obvious. The optimization of design parameters based on the value coefficient of the fiber soil slope is a slope-engineering design method considering comprehensive benefits.

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Effect of Freezing-Thawing on Clayey Soils Reinforced with Human Hair Fibers

Cited by 11 publications

References 18 publications

The Influence of Freeze-Thaw Cycles on Unconfined Compressive Strength of Lignin Fiber-Reinforced Loess

The Influence of Freeze-Thaw Cycles on Unconfined Compressive Strength of Lignin Fiber-Reinforced Loess

Evaluation of the Contribution of Bayburt Tuffite (Bayburt Stone) Dust to the After Freeze-Thaw Strength Values of High Plasticity Clay Soils

Value Coefficient of Polyethylene Fiber Soil Embankment Slope Based on Response Surface Analysis

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